SHEET FEEDING APPARATUS AND IMAGE FORMING APPARATUS

摘要

A sheet feeding roller 101 which feeds a sheet stacked on a sheet supporting plate 110 capable of being lifted and lowered is supported by a support portion as being linearly movable in an up-and-down direction, and a roller biasing member applies a force to the support portion in a direction in which the sheet feeding roller is pressed to s sheet stacked on the sheet supporting plate. A biasing direction 101b of the sheet feeding roller due to the roller biasing member is set within a range between a normal line of the sheet feeding roller at the upstreammost pressing position against the sheet feeding direction and a normal line of the sheet feeding roller at the downstreammost pressing position out of the pressing positions where the sheet feeding roller is pressed to the sheet as being varied in accordance with a sheet stacking state of the sheets.

主权项

1. A sheet feeding apparatus, comprising;
a sheet storage portion which includes a sheet stack tray being swingable in an up-and-down direction; a feeding roller which is arranged above the sheet stack tray and which feeds an uppermost sheet stacked on the sheet stack tray; a support portion which supports the feeding roller as being linearly movable in the up-and-down direction; a roller biasing member which applies a force to the feeding roller in a direction of pressing to the sheet stacked on the sheet stack tray; and a separation member which is pressed against the sheet feeding roller to form a separation portion with the sheet feeding roller that separates the sheets in to single sheet.